Marvel Studios' latest instalment, 'Captain America: The Winter Soldier', is proving to be hugely popular, not just among comic book fans, but all cinemagoers as it reigns No.1 at this week's North American box office, breaking the April earnings' record.

The sequel to 2011's 'Captain America: The First Avenger,' and the ninth instalment in the Marvel Cinematic Universe earned an impressive $96.2 million, which beat the previous highest-grossing movie in the month of April (2011's 'Fast Five') by $10 million.

After 'The Winter Soldier's' impressive domestic debut, and since it was released a week before in several other countries, it has earned $303 million worldwide so far.

The plot occurs two years after the events in New York City, and although 'Steve Rogers' is still struggling to adjust to the modern world, he is still heavily involved with 'S.H.I.E.L.D', even if he isn't convinced with certain aspects of their ethics.

However, after a member of S.H.I.E.L.D. is assassinated, Rogers and the rest of the organisation band together to try and figure out who is behind the attack, but as the All-American hero fights off a tirade of assassins, an unexpected adversary, who can match the Captain's inhuman strength and speed, emerges.

Robert Redford makes his Marvel debut as a senior leader with S.H.I.E.L.D